diff --git a/eng/pipelines/runtime.yml b/eng/pipelines/runtime.yml
index bcab359dde5792..f06667f3e8e6e2 100644
--- a/eng/pipelines/runtime.yml
+++ b/eng/pipelines/runtime.yml
@@ -926,25 +926,25 @@ extends:
 
       # WASI/WASM
 
-      - template: /eng/pipelines/common/templates/wasm-library-tests.yml
-        parameters:
-          platforms:
-            - wasi_wasm
-            - wasi_wasm_win
-          nameSuffix: '_Smoke'
-          extraBuildArgs: /p:EnableAggressiveTrimming=true /p:RunWasmSamples=true /p:AotHostArchitecture=x64 /p:AotHostOS=$(_hostedOS)
-          shouldRunSmokeOnly: true
-          alwaysRun: ${{ variables.isRollingBuild }}
-          scenarios:
-            - WasmTestOnWasmtime
-
-      - template: /eng/pipelines/common/templates/simple-wasm-build-tests.yml
-        parameters:
-          platforms:
-            - wasi_wasm
-            - wasi_wasm_win
-          extraBuildArgs: /p:AotHostArchitecture=x64 /p:AotHostOS=$(_hostedOS)
-          alwaysRun: ${{ variables.isRollingBuild }}
+      # - template: /eng/pipelines/common/templates/wasm-library-tests.yml
+      #   parameters:
+      #     platforms:
+      #       - wasi_wasm
+      #       - wasi_wasm_win
+      #     nameSuffix: '_Smoke'
+      #     extraBuildArgs: /p:EnableAggressiveTrimming=true /p:RunWasmSamples=true /p:AotHostArchitecture=x64 /p:AotHostOS=$(_hostedOS)
+      #     shouldRunSmokeOnly: true
+      #     alwaysRun: ${{ variables.isRollingBuild }}
+      #     scenarios:
+      #       - WasmTestOnWasmtime
+
+      # - template: /eng/pipelines/common/templates/simple-wasm-build-tests.yml
+      #   parameters:
+      #     platforms:
+      #       - wasi_wasm
+      #       - wasi_wasm_win
+      #     extraBuildArgs: /p:AotHostArchitecture=x64 /p:AotHostOS=$(_hostedOS)
+      #     alwaysRun: ${{ variables.isRollingBuild }}
 
       #
       # Android devices
diff --git a/eng/testing/scenarios/BuildWasiAppsJobsList.txt b/eng/testing/scenarios/BuildWasiAppsJobsList.txt
index 86c0517585a480..e69de29bb2d1d6 100644
--- a/eng/testing/scenarios/BuildWasiAppsJobsList.txt
+++ b/eng/testing/scenarios/BuildWasiAppsJobsList.txt
@@ -1,7 +0,0 @@
-Wasi.Build.Tests.InvariantTests
-Wasi.Build.Tests.ILStripTests
-Wasi.Build.Tests.SdkMissingTests
-Wasi.Build.Tests.RuntimeConfigTests
-Wasi.Build.Tests.WasiTemplateTests
-Wasi.Build.Tests.PInvokeTableGeneratorTests
-Wasi.Build.Tests.WasiLibraryModeTests
diff --git a/src/mono/nuget/Microsoft.NET.Workload.Mono.Toolchain.Current.Manifest/WorkloadManifest.Wasi.targets.in b/src/mono/nuget/Microsoft.NET.Workload.Mono.Toolchain.Current.Manifest/WorkloadManifest.Wasi.targets.in
index e0b7323d6bcee2..07477c653a68a2 100644
--- a/src/mono/nuget/Microsoft.NET.Workload.Mono.Toolchain.Current.Manifest/WorkloadManifest.Wasi.targets.in
+++ b/src/mono/nuget/Microsoft.NET.Workload.Mono.Toolchain.Current.Manifest/WorkloadManifest.Wasi.targets.in
@@ -9,4 +9,8 @@
   <PropertyGroup Condition="'$(TargetFrameworkIdentifier)' == '.NETCoreApp'">
     <UsingWasiRuntimeWorkload Condition="'$(UsingWasiRuntimeWorkload)' == ''">$(WasiNativeWorkloadAvailable)</UsingWasiRuntimeWorkload>
   </PropertyGroup>
+
+  <Target Name="FailBuild" BeforeTargets="ProcessFrameworkReferences;Restore;Build;Publish" Condition="'$(RuntimeIdentifier)' == 'wasi-wasm'">
+    <Error Text="The 'wasi-experimental' workload is not supported in .NET 9." />
+  </Target>
 </Project>